Add the chrome.bluetoothLowEnergy.setAdvertisingInterval API.

device/bluetooth/bluetooth_advertisement.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef DEVICE_BLUETOOTH_BLUETOOTH_ADVERTISEMENT_H_
 #define DEVICE_BLUETOOTH_BLUETOOTH_ADVERTISEMENT_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 19 matching lines @@
   // advertisements.
   enum ErrorCode {
     ERROR_UNSUPPORTED_PLATFORM,  // Bluetooth advertisement not supported on
                                  // current platform.
     ERROR_ADVERTISEMENT_ALREADY_EXISTS,  // An advertisement is already
                                          // registered.
     ERROR_ADVERTISEMENT_DOES_NOT_EXIST,  // Unregistering an advertisement which
                                          // is not registered.
     ERROR_ADVERTISEMENT_INVALID_LENGTH,  // Advertisement is not of a valid
                                          // length.
+    ERROR_INVALID_ADVERTISEMENT_INTERVAL,  // Advertisement interval specified
+                                           // is out of valid range.
     INVALID_ADVERTISEMENT_ERROR_CODE
   };
 
   // Type of advertisement.
   enum AdvertisementType {
     // This advertises with the type set to ADV_NONCONN_IND, which indicates
     // to receivers that our device is not connectable.
     ADVERTISEMENT_TYPE_BROADCAST,
     // This advertises with the type set to ADV_IND or ADV_SCAN_IND, which
     // indicates to receivers that our device is connectable.
@@ skipping 89 matching lines @@
   // |observers_| are expected to outlive a BluetoothAdvertisement object.
   base::ObserverList<BluetoothAdvertisement::Observer> observers_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(BluetoothAdvertisement);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_BLUETOOTH_BLUETOOTH_ADVERTISEMENT_H_